Silly walks

Years ago, a friend of mine was studying abroad and had a master acting class with Mr. Cleese. As my friend tells it, the very first day of class Cleese says something along the lines of "Yes, I'm John Cleese, I'm famous, Monty Python etc, etc. However, this is a serious class and our time is limited. If anyone, ever wastes our time mentioning anything related to Monty Python, they will fail. Especially the silly walks sketch." Apparently he was really adamant about the silly walks, specifically. So the whole term plays out and is amazing and at the very end each student get a one-on-one meet with Mr. Cleese to discuss their progress and grade. My friend can't help himself and blurts out how much he loved Monty Python and Fawlty Towers and all of it and that he thinks John Cleese is a genius. Cleese sighs, says "Well, I warned you about what would happen. I'm sorry, but you will not receive a passing mark in my class", stands up and silly walks out of the office.